Create a group

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are present, so the description carries the behavioral burden. It adds a useful behavioral requirement—confirming the group name and members with the user—and the community option. However, it does not disclose side effects, return values, permission requirements, or what happens if a participant cannot be added.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences front-load the core purpose and then add the most important usage instruction—confirmation—plus the relevant community optionality. There is no filler or redundant restating of the schema.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a creation tool with 5 parameters, 2 required, and no output schema, the description plus fully covered schema is enough to invoke correctly: what to create, what to confirm with the user, and the optional community parameter. A note about the response or side effects would improve completeness, but it is not essential for correct selection and invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema already documents all five parameters with descriptions, giving 100% coverage, so the baseline is 3. The description's 'initial set of people' and 'inside a community' loosely map to participants and community, but it adds no format or constraint details beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses a specific verb and resource: 'Create a WhatsApp group with an initial set of people.' It clarifies this is about initial creation rather than later updates, distinguishing it from siblings like update_group and manage_group_participants. The optional community placement also separates it from link_group_to_community.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description gives clear pre-invocation guidance: confirm the name and member list with the user first. It also notes the optional community context. It does not explicitly name alternatives or state when not to use this tool, but the creation scenario is clear enough for an agent to route correctly.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.